A position related information acquisition system through the use of IC labels and mobile data communications

摘要

In general, the acquisition of position information is indispensable to navigation. Latitude and longitude information can be obtained by GPS, which, however, cannot be used under the ground. The resolution of position information service using PHS is quite low. To overcome these problems, we propose a new position related information acquisition system through the use of IC labels and mobile data communications, which consists of IC label, PDA, Server and Database. PDA has a function of IC label reader and that of mobile data communication to Server. The storage content of IC label is not position information itself but a position ID. By radiating radio wave, PDA reads out this position ID, which is then uplink-transmitted to Server using mobile data communications. The position ID is an identification code unique to the physical position of IC label and is used as the address of the lookup table type Database. Therefore, arbitrary not-yet-used position ID can be allotted to IC label posted at an arbitrary place. The contents of Database corresponding to a particular position ID may be latitude, longitude, altitude, URL, floor number, etc., which are downlink-transmitted to PDA.